Re: [PATCH v8 04/10] x86,fs/resctrl: Implement "io_alloc" enable/disable handlers

[Reinette Chatre <reinette.chatre@intel.com>]

Hi Babu,

On 8/5/25 4:30 PM, Babu Moger wrote:
> "io_alloc" enables direct insertion of data from I/O devices into the
> cache.
> 
> On AMD systems, "io_alloc" feature is backed by L3 Smart Data Cache
> Injection Allocation Enforcement (SDCIAE). Change SDCIAE state by setting
> (to enable) or clearing (to disable) bit 1 of MSR L3_QOS_EXT_CFG on all
> logical processors within the cache domain.
> 
> Introduce architecture-specific call to enable and disable the feature.
> 
> The SDCIAE feature details are available in APM listed below [1].
> [1] AMD64 Architecture Programmer's Manual Volume 2: System Programming
> Publication # 24593 Revision 3.41 section 19.4.7 L3 Smart Data Cache
> Injection Allocation Enforcement (SDCIAE)
> 
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537

fyi ... Documentation/process/maintainer-tip.rst has some examples how
the "Link:" can be associated with the changelog. For example, above could
be:

	The SDCIAE feature details are available in APM [1] available
	from [2].
	[1] ...

	Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537 # [2]

> Signed-off-by: Babu Moger <babu.moger@amd.com>
> ---

Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>

Reinette